package com.itheima.reggie.web;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.ICategoryService;
import com.itheima.reggie.service.IDishFlavorService;
import com.itheima.reggie.service.IDishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.function.Function;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {
    @Autowired
    private IDishService dishService;

    @Autowired
    private IDishFlavorService dishFlavorService;

    @Autowired
    private ICategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;

    //新增菜品信息
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        dishService.saveWithFlavor(dishDto);

        //清理所有菜品的缓存数据
        //Set keys = redisTemplate.keys("dish_*"); //获取所有以dish_xxx开头的key
       // redisTemplate.delete(keys); //删除这些key

        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("菜品保存成功");
    }


  /*  @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name){
        //构造分页构造器对象
        Page<Dish> pageInfo = new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null,Dish::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo,queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list = records.stream().map((item) -> {

            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }*/
    //菜品信息分页查询
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
        //分页构造器
        Page<Dish> pageInfo = new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage = new Page<>();
        //条件构造
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name!=null,Dish::getName,name);
        queryWrapper.eq(Dish::getIs_deleted,0);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);
        //执行分页查询
        dishService.page(pageInfo,queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list =  records.stream().map((item)->{
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            Long categoryId = item.getCategoryId();
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if (category!=null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);
        return R.success(dishDtoPage);
    }

    //根据ID查询菜品信息
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){
       DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    //修改菜品信息
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        dishService.updateWithFlavor(dishDto);

        //清理所有菜品的缓存数据
        //Set keys = redisTemplate.keys("dish_*"); //获取所有以dish_xxx开头的key
        //redisTemplate.delete(keys); //删除这些key

        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("菜品更新成功");
    }

    //删除
/*    @DeleteMapping
    public R<String> delete(@RequestParam List<Long> ids){
        dishService.removeByIds(ids);
        return R.success("删除成功");
    }*/
    @DeleteMapping
    public R<String> delete(@RequestParam List<Long> ids){
        dishService.removeWithdish(ids);
        return R.success("删除成功");
    }


    //起售、停售
    @PostMapping("/status/{status}")
    public R<String> close(@PathVariable("status") Integer status,@RequestParam List<Long> ids){
               LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(ids!=null,Dish::getId,ids);
        List<Dish> list = dishService.list(queryWrapper);

        for (Dish dish : list) {
            dish.setStatus(status);
            dishService.updateById(dish);
        }
     return R.success("信息修改成功");
    }
/*
    @PostMapping("/status/{status}")
    public R<String> sell(@PathVariable("status") Integer status, @RequestParam List<Long> ids) {
        log.info("根据id进行起售和禁售");
        dishService.statusWithFlavor(status, ids);
        return R.success("状态修改成功");
    }
*/

    //根据分类id查询菜品列表
/*        @GetMapping("/list")
    public R<List<Dish>> list(Dish dish){
        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
        //添加查询状态，状态为1的表示起售状态，能够被查询到
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序条件，先按照排序规则sort排序，再按照修改时间降序排序
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        //调用查询方法执行查询，返回结果
        List<Dish> list = dishService.list(queryWrapper);
        return R.success(list);
    }*/
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){
        List<DishDto> dishDtoList = null;
        //动态构造key
        String key = "dish_" + dish.getCategoryId() + "_" +dish.getStatus();
        //先从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
        redisTemplate.opsForValue().get(key);
        if(dishDtoList != null){
            //如果存在，直接返回，无需查询数据库
            return R.success(dishDtoList);
        }

        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null ,Dish::getCategoryId,dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            //当前菜品的id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);
            //SQL:select * from dish_flavor where dish_id = ?
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);

            return dishDto;
        }).collect(Collectors.toList());

        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);

        return R.success(dishDtoList);
    }




}
